<template>
  <div id="app">
    <ul>
      <li v-for="item in myArr" :key="item">{{ item }}</li>
    </ul>
    <button @click="btn">走一走</button>
  </div>
</template>

<script>
export default {
     data () {
         return {
             myArr:['帅哥','美女','人妖']
         }
     },
     methods: {
         btn(){
              this.myArr.push(this.myArr[0]);
              this.myArr.shift();
         }
     }
}
</script>

<style>

</style>